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We might have memory@ nodes with "linux,usable-memory" set to zero (for example, to replicate powernv's behaviour for GPU coherent memory) which means that the memory needs an extra initialization but since it can be used afterwards, the pseries platform will try mapping it for DMA so the DMA window needs to cover those memory regions too; if the window cannot cover new memory regions, the memory onlining fails. This walks through the memory nodes to find the highest RAM address to let a huge DMA window cover that too in case this memory gets onlined later. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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| math-emu | ||
| mm | ||
| net | ||
| oprofile | ||
| perf | ||
| platforms | ||
| purgatory | ||
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